package sanliuzero;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Main {

    public static void main(String[] args) throws Exception{
        BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
        String s = buf.readLine();
        String[] ss = s.split(" ");
        int n = Integer.parseInt(ss[0]);
        int p = Integer.parseInt(ss[1]);
        int q = Integer.parseInt(ss[2]);
        s = buf.readLine();
        ss = s.split(" ");
        int[] arr = new int[n];
        for (int i = 0; i < n; i++){
            arr[i] = Integer.parseInt(ss[i]);
        }
        Arrays.sort(arr);
        int a = 100;
        int res = 0;
        for (int i = n - 1; i >= 0; i--){
            int score = (a*p + arr[i]*q)/100;
            if (score >= 60){
                res++;
                if (i - 1 >= 0 && arr[i] != arr[i - 1]){
                    a--;
                }
            } else {
                break;
            }
        }
        System.out.println(res);
    }
}
